What happens if an outside-air intake louver is covered from behind?

A blocked intake louver can starve outside air and create building pressure problems. Stop cover work, document the obstruction, and coordinate opening the full approved intake path.

['If a wall panel, plywood, or façade layer covers the back of an intake louver, the louver may look finished outside but be dead behind the wall.', 'Stop the covering trade before it gets buried. Verify the louver free path, duct/plenum connection, bird screen, and approved opening. Get the obstruction removed or re-framed so outside air can actually enter the system.']

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